Registration Dossier

Administrative data

Endpoint:
vapour pressure
Type of information:
experimental study
Adequacy of study:
key study
Study period:
28 March-27 June 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant study according to guideline

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report Date:
2011

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Version / remarks:
(2006)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Version / remarks:
(OJEU no. L220, August 24, 2009)
Deviations:
no
Principles of method if other than guideline:
The isothermal thermogravimetric effusion method is validated in the range 10E-8 - 10E+3 Pa using a set of reference substances with known vapour pressures.
GLP compliance:
yes (incl. certificate)
Type of method:
effusion method: by loss of weight or by trapping vaporisate

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Identification: Neosolue-Aqulio
Molecular formula: C20H36O8
Molecular weight: 404.5
CAS Number: 922165-31-9
Description: Clear colourless to very pale yellow liquid
Batch: TVI-714
Purity: 99.5% (GC)
Test substance storage: At room temperature in the dark
Stability under storage conditions: Stable
Expiry date: 07 October 2012 (Retest date)

Results and discussion

Vapour pressure
Temp.:
20 °C
Vapour pressure:
1.51 Pa
Remarks on result:
other: Equivalent to 1.13 x 10^-8 mm Hg

Any other information on results incl. tables

Results of the isothermal TGA analysis are shown in the table below. The coefficient of correlation (r) of the plot of the log vTof the test substance as function of the reciprocal temperatures was > 0.99. Extrapolation of the curve to 20°C resulted in a value of -8.79 for the logνT, 20of the test substance. Fitting this value in the regression curve, a vapour pressure of 1.51 x 10 -6Pa = 1.13 x 10-8mm Hg was obtained.

Temperature
(°C)

Weight loss
(µg/min)

νT
(g/cm2/h)

logνT

160

10.60

 1.27´10-3

- 2.90

 

11.43

 1.36´10-3

- 2.87

170

21.31

 2.54´10-3

- 2.59

 

 

 

 

180

39.53

4.72´10-3

- 2.33

 

37.88

4.52´10-3

- 2.34

 

Applicant's summary and conclusion

Conclusions:
The isothermal thermogravimetric effusion method was chosen for the determination of the vapour pressure of Neosolue-Aqulio. The vapour pressure of the test substance at 20°C (293K) was 1.51 x 10^-6 Pa = 1.13 x 10^-8 mm Hg.